There is a cross-browser getElementById method of the document object, which returns a reference to the object with the specified value of the ID attribute.

for (var i = 0; i '<' arguments.length;i++) 
{
var element = arguments[i];
if (typeof element == 'string')
element = document.getElementById(element); 
if (arguments.length == 1) 
return element; 
elements.push(element); 
} 
return elements; 
} 

One nice thing about this method is that you can pass either one argument or multiple arguments. If one argument is passed it returns a reference to the object with the specified ID value. Otherwise it returns an array of references to the objects with the specified ID values. Another nice thing about this method is that it takes objects as well as strings as arguments.

Instead of the following:

var elem = document.getElementById('TextBox1');

You can now call the $ method as follows:

var elem = $('TextBox1');

Or you can return multiple DOM elements with one simple method call:

var elemArr = $('TextBox1', 'TextBox2');